Question

. Mkay ! So, one molecule of nitrogen reacting w/3 molecules of hydrogen makes 2 of ammonia. How many molecules of nitrogen must react w/42 molecules of hydrogen to make 28,of ammonia?

Answer 1

This doesn't look like math.

Answer 2

2 nitro react with 3 hydro to make 2 ammo

ratio: 2 : 3 : 2

we want : x : 42 : 28

2(14) : 3(14) : 2(14)

so x = 28
28 molecules of nitrogen are needed

check:
ratio of 28:42:28
= 2:3:2

Answer 3

Or use chemistry.
42 H2 x (1 mol N2/3 mol H2) = 42 x 1/3 = 14.
Check the NH3 production.
42 H2 x (2 mol NH3/3 mol H2) = 42 x 2/3 = 28.

Answer 4

OMG YOU HYPOCRITE DO THE HOMEWORK YOURSELF